HyTerra Update Reports Gas Shows in Kansas Appraisal Wells, Plans Testing
HyTerra Limited (ASX: HYT) has reported encouraging results from its appraisal well program in Kansas, aimed at evaluating naturally occurring geologic hydrogen and helium resources.
At the Sue Duroche 3 well, drilling reached the Pre-Cambrian basement section, which displayed wellhead pressure and free-flowed a mixture of water and gas to surface. Multiple inflow zones were identified within fractured basement intervals, suggesting potential connectivity to deeper gas sources.
The Blythe 13-20 well, while unable to free flow naturally, produced measurable volumes of gas to the annulus during swabbing operations, indicating reservoir gas presence despite lower formation drive.
Meanwhile, clean-up operations are underway at the McCoy 1 well, with results anticipated in the coming weeks. These will add further insight into the overall productivity potential across the program area.
Based on these findings, HyTerra is designing a production testing program to assess steady-state gas flow rates and compositions. The company’s appraisal campaign is focused on the Nemaha Ridge and Geneva Project areas, strategically located near existing infrastructure and major industrial hubs, offering clear pathways to future commercialization.
Full press release is attached below:
ASX Release, 11 August 2025
Highlights
Workover rig has commenced clean-up operations for the McCoy 1 well.Sue Duroche 3 and Blythe 13-20 Pre-Cambrian basement is fractured and capable of inflow.Gas shows at well head were observed at both Sue Duroche 3 and Blythe 13-20.Based on these encouraging results the Company is designing and planning a production testing program.
HyTerra Ltd (ASX:HYT) is pleased to provide an update on its appraisal well activities to date.
McCoy 1 conversion to appraisal well
The workover rig has commenced clean-up operations. The activities will take one week to complete, with data and analysis being completed over the coming weeks.
Sue Duroche 3 appraisal well
As previously announced, a work over rig was mobilised to Sue Duroche earlier in the year. The objective of converting Sue Duroche 3 to an appraisal well was to clean up the well bore by removing drilling fluid. Based on initial observations, the Company decided to re-mobilise the work over rig back to Sue Duroche 3 to appraise inflow potential in the Pre-Cambrian basement section.
The well was found to have pressure at the well head, and when opened, free flowed a mixture of water and gas into site tanks. Additionally, from production logging, multiple zones of inflow were identified within the fractured Pre-Cambrian basement.
Blythe 13-20 appraisal well
The objective of converting Blythe 13-20 to an appraisal well was to clean up the well bore by removing drilling fluid and appraise the inflow potential in the Pre-Cambrian basement section.
The well could not free flow through well head. However, when swabbed, gas was observed in the annulus.
Next Steps
Based on these encouraging results, the Company is designing and planning a production testing program. A production test is required to appraise steady state gas flow rates and compositions.
Further updates will the provided once McCoy 1 results become available.
